Plastic test tubes with color coded screw caps are available in a choice of blue, red, yellow and white. Kartell 16mm test tubes have quick closure screw caps. Plastic test tubes are leakproof and suitable for centrifugation up to 4000xg. (100 per PK)
The low friction properties of high density polyethylene in these miniature plastic stopcocks allows for easy turning of PP key which requires no lubricant, thus eliminating blockage of the bores with grease. (10 per CS)